GNU bug report logs - #79955
emacs 30.2 test failure on ppc64el (-O3)

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Package: emacs; Reported by: Gianfranco Costamagna <locutusofborg@HIDDEN>; Done: Sean Whitton <spwhitton@HIDDEN>; Maintainer for emacs is bug-gnu-emacs@HIDDEN.

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To: Eli Zaretskii <eliz@HIDDEN>
Subject: Re: bug#79955: emacs 30.2 test failure on ppc64el (-O3)
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Hello,

Eli Zaretskii [17/Jan  2:18pm +02] wrote:
>> From: Sean Whitton <spwhitton@HIDDEN>
>> Cc: Gianfranco Costamagna <locutusofborg@HIDDEN>,  79955@HIDDEN=
.org
>> Date: Sat, 03 Jan 2026 11:59:08 +0000
>>
>> Hello,
>>
>> Eli Zaretskii [03/Jan 12:04pm +02] wrote:
>> > Any ideas or suggestions for how to handle this problem?  It is not
>> > clear to me whether this is a problem in Emacs or in the library, but
>> > I tend to think it's in the library, in which case we should close
>> > this, IMO.
>>
>> This sort of thing has to be investigated within the distro, I think.
>> Ubuntu passes many exotic compile options, including enabling LTO (which
>> Debian does not).
>>
>> Gianfranco, I think that you need to rule out the problem being in the
>> library, before there is much useful work that we can do here at
>> upstream.
>
> Should we close this bug report, then?

Yes, I think that makes sense, and we can reopen/merge if more
actionable information becomes available.

=2D-=20
Sean Whitton

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--=-=-=--




Notification sent to Gianfranco Costamagna <locutusofborg@HIDDEN>:
bug acknowledged by developer. Full text available.
Reply sent to Sean Whitton <spwhitton@HIDDEN>:
You have taken responsibility. Full text available.

Message received at 79955 <at> debbugs.gnu.org:


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Date: Sat, 17 Jan 2026 14:18:46 +0200
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From: Eli Zaretskii <eliz@HIDDEN>
To: Sean Whitton <spwhitton@HIDDEN>
In-Reply-To: <87secmlxf7.fsf@HIDDEN> (message from Sean
 Whitton on Sat, 03 Jan 2026 11:59:08 +0000)
Subject: Re: bug#79955: emacs 30.2 test failure on ppc64el (-O3)
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> From: Sean Whitton <spwhitton@HIDDEN>
> Cc: Gianfranco Costamagna <locutusofborg@HIDDEN>,  79955 <at> debbugs.gnu.org
> Date: Sat, 03 Jan 2026 11:59:08 +0000
> 
> Hello,
> 
> Eli Zaretskii [03/Jan 12:04pm +02] wrote:
> > Any ideas or suggestions for how to handle this problem?  It is not
> > clear to me whether this is a problem in Emacs or in the library, but
> > I tend to think it's in the library, in which case we should close
> > this, IMO.
> 
> This sort of thing has to be investigated within the distro, I think.
> Ubuntu passes many exotic compile options, including enabling LTO (which
> Debian does not).
> 
> Gianfranco, I think that you need to rule out the problem being in the
> library, before there is much useful work that we can do here at
> upstream.

Should we close this bug report, then?




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#79955; Package emacs. Full text available.

Message received at 79955 <at> debbugs.gnu.org:


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From: Sean Whitton <spwhitton@HIDDEN>
To: Eli Zaretskii <eliz@HIDDEN>
Subject: Re: bug#79955: emacs 30.2 test failure on ppc64el (-O3)
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Hello,

Eli Zaretskii [03/Jan 12:04pm +02] wrote:
> Any ideas or suggestions for how to handle this problem?  It is not
> clear to me whether this is a problem in Emacs or in the library, but
> I tend to think it's in the library, in which case we should close
> this, IMO.

This sort of thing has to be investigated within the distro, I think.
Ubuntu passes many exotic compile options, including enabling LTO (which
Debian does not).

Gianfranco, I think that you need to rule out the problem being in the
library, before there is much useful work that we can do here at
upstream.

-- 
Sean Whitton




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#79955; Package emacs. Full text available.

Message received at 79955 <at> debbugs.gnu.org:


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Date: Sat, 03 Jan 2026 12:04:38 +0200
Message-Id: <86a4yvm2q1.fsf@HIDDEN>
From: Eli Zaretskii <eliz@HIDDEN>
To: Gianfranco Costamagna <locutusofborg@HIDDEN>,
 Sean Whitton <spwhitton@HIDDEN>
In-Reply-To: <258912364.2220740.1765370633467@HIDDEN> (message from
 Gianfranco Costamagna on Wed, 10 Dec 2025 12:43:53 +0000 (UTC))
Subject: Re: bug#79955: emacs 30.2 test failure on ppc64el (-O3)
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> Date: Wed, 10 Dec 2025 12:43:53 +0000 (UTC)
> From: Gianfranco Costamagna <locutusofborg@HIDDEN>
> Cc: "79955 <at> debbugs.gnu.org" <79955 <at> debbugs.gnu.org>
> 
> Hello
> (sorry I replied from mobile, by bad)
> 
> 
> >Then my only other idea is to try building with an older version of
> >LCMS library, and/or try building Emacs with -O1 or even -O0.
> >
> >The tests pass here, so either this is a bug in GCC or something else
> >is at work here that I cannot imagine.  In any case, I suggest to
> >report this to whoever maintains the Ubuntu distro of Emacs, so that
> >they could investigate.
> 
> As already said, going back to O2 works.
> I did build LCMS with O0, then emacs with O0 and no issue in that test
> Now I'm trying emacs with O3 and LCMS with O0
> 
> Check logs
> Build emacs with O2 test OK
> https://launchpadlibrarian.net/836106691/buildlog_ubuntu-resolute-ppc64el.emacs_1%3A30.2+1-2ubuntu6_BUILDING.txt.gz
> 
> Emacs built with O0 LCMS O0 test NOK
> https://launchpadlibrarian.net/836608989/buildlog_ubuntu-resolute-ppc64el.emacs_1%3A30.2+1-2ubuntu7_BUILDING.txt.gz
> 
> Emacs built with O3 LCMS O0 test OK
> https://launchpadlibrarian.net/836617428/buildlog_ubuntu-resolute-ppc64el.emacs_1%3A30.2+1-2ubuntu8_BUILDING.txt.gz

Sean,

Any ideas or suggestions for how to handle this problem?  It is not
clear to me whether this is a problem in Emacs or in the library, but
I tend to think it's in the library, in which case we should close
this, IMO.




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#79955; Package emacs. Full text available.

Message received at 79955 <at> debbugs.gnu.org:


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Date: Wed, 10 Dec 2025 12:43:53 +0000 (UTC)
From: Gianfranco Costamagna <locutusofborg@HIDDEN>
To: Eli Zaretskii <eliz@HIDDEN>
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Subject: Re: bug#79955: emacs 30.2 test failure on ppc64el (-O3)
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Hello
(sorry I replied from mobile, by bad)


>Then my only other idea is to try building with an older version of
>LCMS library, and/or try building Emacs with -O1 or even -O0.
>
>The tests pass here, so either this is a bug in GCC or something else
>is at work here that I cannot imagine.=C2=A0 In any case, I suggest to
>report this to whoever maintains the Ubuntu distro of Emacs, so that
>they could investigate.

As already said, going back to O2 works.
I did build LCMS with O0, then emacs with O0 and no issue in that test
Now I'm trying emacs with O3 and LCMS with O0

Check logs
Build emacs with O2 test OK
https://launchpadlibrarian.net/836106691/buildlog_ubuntu-resolute-ppc64el.e=
macs_1%3A30.2+1-2ubuntu6_BUILDING.txt.gz

Emacs built with O0 LCMS O0 test NOK
https://launchpadlibrarian.net/836608989/buildlog_ubuntu-resolute-ppc64el.e=
macs_1%3A30.2+1-2ubuntu7_BUILDING.txt.gz

Emacs built with O3 LCMS O0 test OK
https://launchpadlibrarian.net/836617428/buildlog_ubuntu-resolute-ppc64el.e=
macs_1%3A30.2+1-2ubuntu8_BUILDING.txt.gz


G.




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#79955; Package emacs. Full text available.

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Subject: Re: bug#79955: emacs 30.2 test failure on ppc64el (-O3)
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> Date: Tue, 9 Dec 2025 11:47:03 +0000 (UTC)
> From: Gianfranco Costamagna <locutusofborg@HIDDEN>
> 
> Hello yes It Is persisting

Then my only other idea is to try building with an older version of
LCMS library, and/or try building Emacs with -O1 or even -O0.

The tests pass here, so either this is a bug in GCC or something else
is at work here that I cannot imagine.  In any case, I suggest to
report this to whoever maintains the Ubuntu distro of Emacs, so that
they could investigate.




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#79955; Package emacs. Full text available.

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Date: Mon, 08 Dec 2025 14:14:30 +0200
Message-Id: <868qfduq55.fsf@HIDDEN>
From: Eli Zaretskii <eliz@HIDDEN>
To: Gianfranco Costamagna <locutusofborg@HIDDEN>
In-Reply-To: <648883088.8490007.1765150669204@HIDDEN> (message from
 Gianfranco Costamagna on Sun, 7 Dec 2025 23:37:49 +0000 (UTC))
Subject: Re: bug#79955: emacs 30.2 test failure on ppc64el (-O3)
References: <759798795.7946236.1765030185735.ref@HIDDEN>
 <759798795.7946236.1765030185735@HIDDEN> <864iq3woh7.fsf@HIDDEN>
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> Date: Sun, 7 Dec 2025 23:37:49 +0000 (UTC)
> From: Gianfranco Costamagna <locutusofborg@HIDDEN>
> Cc: "79955 <at> debbugs.gnu.org" <79955 <at> debbugs.gnu.org>
> 
> Hello, I did try to build the library with -O2, thanks for the suggestion (I'm really clueless, I thought it was an internal library, not an external one!)
> 
> This is one built with O3 library
> 
> https://launchpad.net/~costamagnagianfranco/+archive/ubuntu/costamagnagianfranco-ppa/+build/31566931/+files/buildlog_ubuntu-resolute-ppc64el.emacs_1%3A30.2+1-2ubuntu4_BUILDING.txt.gz
> 
> This one uses a library built without FORTIFY_FLAGS
> https://launchpadlibrarian.net/836091682/buildlog_ubuntu-resolute-ppc64el.emacs_1%3A30.2+1-2ubuntu5_BUILDING.txt.gz
> 
> This one uses a library built with -O2
> 
> https://launchpadlibrarian.net/836106691/buildlog_ubuntu-resolute-ppc64el.emacs_1%3A30.2+1-2ubuntu6_BUILDING.txt.gz

And the problem persists with both builds?




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#79955; Package emacs. Full text available.

Message received at 79955 <at> debbugs.gnu.org:


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Date: Sun, 7 Dec 2025 23:37:49 +0000 (UTC)
From: Gianfranco Costamagna <locutusofborg@HIDDEN>
To: Eli Zaretskii <eliz@HIDDEN>
Message-ID: <648883088.8490007.1765150669204@HIDDEN>
In-Reply-To: <86o6oavdhr.fsf@HIDDEN>
References: <759798795.7946236.1765030185735.ref@HIDDEN>
 <759798795.7946236.1765030185735@HIDDEN> <864iq3woh7.fsf@HIDDEN>
 <1407501545.302415.1765093552086@HIDDEN> <86o6oavdhr.fsf@HIDDEN>
Subject: Re: bug#79955: emacs 30.2 test failure on ppc64el (-O3)
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Hello, I did try to build the library with -O2, thanks for the suggestion (=
I'm really clueless, I thought it was an internal library, not an external =
one!)

This is one built with O3 library

https://launchpad.net/~costamagnagianfranco/+archive/ubuntu/costamagnagianf=
ranco-ppa/+build/31566931/+files/buildlog_ubuntu-resolute-ppc64el.emacs_1%3=
A30.2+1-2ubuntu4_BUILDING.txt.gz

This one uses a library built without FORTIFY_FLAGS
https://launchpadlibrarian.net/836091682/buildlog_ubuntu-resolute-ppc64el.e=
macs_1%3A30.2+1-2ubuntu5_BUILDING.txt.gz

This one uses a library built with -O2

https://launchpadlibrarian.net/836106691/buildlog_ubuntu-resolute-ppc64el.e=
macs_1%3A30.2+1-2ubuntu6_BUILDING.txt.gz


G.






Il domenica 7 dicembre 2025 alle ore 10:37:58 CET, Eli Zaretskii <eliz@gnu.=
org> ha scritto:=20





> Date: Sun, 7 Dec 2025 07:45:52 +0000 (UTC)

> From: Gianfranco Costamagna <locutusofborg@HIDDEN>
> Cc: "79955 <at> debbugs.gnu.org" <79955 <at> debbugs.gnu.org>
>=20
> I think if O3 is a bad idea, that maybe we can add some configure check a=
nd error out in that case?
> This would be beneficial also for other distro...

Maybe.


What about my question regarding the problem being in the library, not
in Emacs?=C2=A0 I suggest to communicate this to the mnaintainers of the
Ubuntu package for the LCMS library, and ask them to see if it's the
library code that needs to be fixed.

Thanks.





Information forwarded to bug-gnu-emacs@HIDDEN:
bug#79955; Package emacs. Full text available.

Message received at 79955 <at> debbugs.gnu.org:


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Date: Sun, 07 Dec 2025 11:37:52 +0200
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To: Gianfranco Costamagna <locutusofborg@HIDDEN>
In-Reply-To: <1407501545.302415.1765093552086@HIDDEN> (message from
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Subject: Re: bug#79955: emacs 30.2 test failure on ppc64el (-O3)
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> Date: Sun, 7 Dec 2025 07:45:52 +0000 (UTC)
> From: Gianfranco Costamagna <locutusofborg@HIDDEN>
> Cc: "79955 <at> debbugs.gnu.org" <79955 <at> debbugs.gnu.org>
> 
> I think if O3 is a bad idea, that maybe we can add some configure check and error out in that case?
> This would be beneficial also for other distro...

Maybe.

What about my question regarding the problem being in the library, not
in Emacs?  I suggest to communicate this to the mnaintainers of the
Ubuntu package for the LCMS library, and ask them to see if it's the
library code that needs to be fixed.

Thanks.




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#79955; Package emacs. Full text available.

Message received at 79955 <at> debbugs.gnu.org:


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Date: Sun, 7 Dec 2025 07:45:52 +0000 (UTC)
From: Gianfranco Costamagna <locutusofborg@HIDDEN>
To: Eli Zaretskii <eliz@HIDDEN>
Message-ID: <1407501545.302415.1765093552086@HIDDEN>
In-Reply-To: <864iq3woh7.fsf@HIDDEN>
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 <759798795.7946236.1765030185735@HIDDEN> <864iq3woh7.fsf@HIDDEN>
Subject: Re: bug#79955: emacs 30.2 test failure on ppc64el (-O3)
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I think if O3 is a bad idea, that maybe we can add some configure check and=
 error out in that case?
This would be beneficial also for other distro...

G.






Il sabato 6 dicembre 2025 alle ore 17:43:10 CET, Eli Zaretskii <eliz@HIDDEN=
g> ha scritto:=20





> Date: Sat, 6 Dec 2025 14:09:45 +0000 (UTC)

> From: Gianfranco Costamagna <locutusofborg@HIDDEN>
>=20
> Hello, I have a test failure on Ubuntu, when Emacs is built with O3 on pp=
c64el
> (this is the default, I guess also Debian has the same error when the O3 =
is used)
>=20
> Test lcms-cri-cam02-ucs backtrace:
> =C2=A0=C2=A0signal(ert-test-failed (((should (eql 0.0 (lcms-cam02-ucs '(0=
.5 0.5=20
> =C2=A0=C2=A0ert-fail(((should (eql 0.0 (lcms-cam02-ucs '(0.5 0.5 0.5) '(0=
.5 0.5=20
> =C2=A0=C2=A0#f(compiled-function () #<bytecode 0x90cea133b5e614>)()
> =C2=A0=C2=A0#f(compiled-function () #<bytecode 0xe4f31d36a0df0a1>)()
> =C2=A0=C2=A0handler-bind-1(#f(compiled-function () #<bytecode 0xe4f31d36a=
0df0a1>
> =C2=A0=C2=A0ert--run-test-internal(#s(ert--test-execution-info :test #s(e=
rt-test
> =C2=A0=C2=A0ert-run-test(#s(ert-test :name lcms-cri-cam02-ucs :documentat=
ion "Te
> =C2=A0=C2=A0ert-run-or-rerun-test(#s(ert--stats :selector (not (or ... ..=
.)) :te
> =C2=A0=C2=A0ert-run-tests((not (or (tag :expensive-test) (tag :unstable))=
) #f(co
> =C2=A0=C2=A0ert-run-tests-batch((not (or (tag :expensive-test) (tag :unst=
able)))
> =C2=A0=C2=A0ert-run-tests-batch-and-exit((not (or (tag :expensive-test) (=
tag :un
> =C2=A0=C2=A0eval((ert-run-tests-batch-and-exit '(not (or (tag :expensive-=
test) (
> =C2=A0=C2=A0command-line-1(("-L" ":/<<PKGBUILDDIR>>/debian/build
> =C2=A0=C2=A0command-line()
> =C2=A0=C2=A0normal-top-level()
> Test lcms-cri-cam02-ucs condition:
> =C2=A0=C2=A0=C2=A0=C2=A0(ert-test-failed
> =C2=A0=C2=A0=C2=A0=C2=A0 ((should (eql 0.0 (lcms-cam02-ucs ... ...))) :fo=
rm
> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0(eql 0.0 3.4662020221023775e-16) :val=
ue nil))
> =C2=A0=C2=A0 FAILED=C2=A0=C2=A02/6=C2=A0=C2=A0lcms-cri-cam02-ucs (0.00010=
6 sec) at ../../build-src/test/src/lcms-tests.el:66
>=20
> This is happening since quite some time (at least 2018), probably since w=
hen Ubuntu defaulted to O3 for the architecture.


Are you sure this is a problem with Emacs and not with the LCMS
library?=C2=A0 AFAICT, the test in question calls functions that just call
LCMS APIs, and other than that perform only trivial arithmetics and/or
call libc functions.

Btw, building Emacs with -O3 is a bad idea, and I seriously consider
the possibility of declaring such builds unsupported, certainly given
the high probability of bugs in the compiler when using -O3.=C2=A0 Maybe
you should communicate that to the Ubuntu package maintainers.





Information forwarded to bug-gnu-emacs@HIDDEN:
bug#79955; Package emacs. Full text available.

Message received at 79955 <at> debbugs.gnu.org:


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Date: Sat, 06 Dec 2025 18:43:00 +0200
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To: Gianfranco Costamagna <locutusofborg@HIDDEN>
In-Reply-To: <759798795.7946236.1765030185735@HIDDEN> (message from
 Gianfranco Costamagna on Sat, 6 Dec 2025 14:09:45 +0000 (UTC))
Subject: Re: bug#79955: emacs 30.2 test failure on ppc64el (-O3)
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> Date: Sat, 6 Dec 2025 14:09:45 +0000 (UTC)
> From: Gianfranco Costamagna <locutusofborg@HIDDEN>
> 
> Hello, I have a test failure on Ubuntu, when Emacs is built with O3 on ppc64el
> (this is the default, I guess also Debian has the same error when the O3 is used)
> 
> Test lcms-cri-cam02-ucs backtrace:
>   signal(ert-test-failed (((should (eql 0.0 (lcms-cam02-ucs '(0.5 0.5 
>   ert-fail(((should (eql 0.0 (lcms-cam02-ucs '(0.5 0.5 0.5) '(0.5 0.5 
>   #f(compiled-function () #<bytecode 0x90cea133b5e614>)()
>   #f(compiled-function () #<bytecode 0xe4f31d36a0df0a1>)()
>   handler-bind-1(#f(compiled-function () #<bytecode 0xe4f31d36a0df0a1>
>   ert--run-test-internal(#s(ert--test-execution-info :test #s(ert-test
>   ert-run-test(#s(ert-test :name lcms-cri-cam02-ucs :documentation "Te
>   ert-run-or-rerun-test(#s(ert--stats :selector (not (or ... ...)) :te
>   ert-run-tests((not (or (tag :expensive-test) (tag :unstable))) #f(co
>   ert-run-tests-batch((not (or (tag :expensive-test) (tag :unstable)))
>   ert-run-tests-batch-and-exit((not (or (tag :expensive-test) (tag :un
>   eval((ert-run-tests-batch-and-exit '(not (or (tag :expensive-test) (
>   command-line-1(("-L" ":/<<PKGBUILDDIR>>/debian/build
>   command-line()
>   normal-top-level()
> Test lcms-cri-cam02-ucs condition:
>     (ert-test-failed
>      ((should (eql 0.0 (lcms-cam02-ucs ... ...))) :form
>       (eql 0.0 3.4662020221023775e-16) :value nil))
>    FAILED  2/6  lcms-cri-cam02-ucs (0.000106 sec) at ../../build-src/test/src/lcms-tests.el:66
> 
> This is happening since quite some time (at least 2018), probably since when Ubuntu defaulted to O3 for the architecture.

Are you sure this is a problem with Emacs and not with the LCMS
library?  AFAICT, the test in question calls functions that just call
LCMS APIs, and other than that perform only trivial arithmetics and/or
call libc functions.

Btw, building Emacs with -O3 is a bad idea, and I seriously consider
the possibility of declaring such builds unsupported, certainly given
the high probability of bugs in the compiler when using -O3.  Maybe
you should communicate that to the Ubuntu package maintainers.




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#79955; Package emacs. Full text available.

Message received at submit <at> debbugs.gnu.org:


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Date: Sat, 6 Dec 2025 14:09:45 +0000 (UTC)
From: Gianfranco Costamagna <locutusofborg@HIDDEN>
To: "bug-gnu-emacs@HIDDEN" <bug-gnu-emacs@HIDDEN>
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Subject: emacs 30.2 test failure on ppc64el (-O3)
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Hello, I have a test failure on Ubuntu, when Emacs is built with O3 on ppc6=
4el
(this is the default, I guess also Debian has the same error when the O3 is=
 used)

Test lcms-cri-cam02-ucs backtrace:
=C2=A0=C2=A0signal(ert-test-failed (((should (eql 0.0 (lcms-cam02-ucs '(0.5=
 0.5=20
=C2=A0=C2=A0ert-fail(((should (eql 0.0 (lcms-cam02-ucs '(0.5 0.5 0.5) '(0.5=
 0.5=20
=C2=A0=C2=A0#f(compiled-function () #<bytecode 0x90cea133b5e614>)()
=C2=A0=C2=A0#f(compiled-function () #<bytecode 0xe4f31d36a0df0a1>)()
=C2=A0=C2=A0handler-bind-1(#f(compiled-function () #<bytecode 0xe4f31d36a0d=
f0a1>
=C2=A0=C2=A0ert--run-test-internal(#s(ert--test-execution-info :test #s(ert=
-test
=C2=A0=C2=A0ert-run-test(#s(ert-test :name lcms-cri-cam02-ucs :documentatio=
n "Te
=C2=A0=C2=A0ert-run-or-rerun-test(#s(ert--stats :selector (not (or ... ...)=
) :te
=C2=A0=C2=A0ert-run-tests((not (or (tag :expensive-test) (tag :unstable))) =
#f(co
=C2=A0=C2=A0ert-run-tests-batch((not (or (tag :expensive-test) (tag :unstab=
le)))
=C2=A0=C2=A0ert-run-tests-batch-and-exit((not (or (tag :expensive-test) (ta=
g :un
=C2=A0=C2=A0eval((ert-run-tests-batch-and-exit '(not (or (tag :expensive-te=
st) (
=C2=A0=C2=A0command-line-1(("-L" ":/<<PKGBUILDDIR>>/debian/build
=C2=A0=C2=A0command-line()
=C2=A0=C2=A0normal-top-level()
Test lcms-cri-cam02-ucs condition:
=C2=A0=C2=A0=C2=A0=C2=A0(ert-test-failed
=C2=A0=C2=A0=C2=A0=C2=A0 ((should (eql 0.0 (lcms-cam02-ucs ... ...))) :form
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0(eql 0.0 3.4662020221023775e-16) :value=
 nil))
=C2=A0=C2=A0 FAILED=C2=A0=C2=A02/6=C2=A0=C2=A0lcms-cri-cam02-ucs (0.000106 =
sec) at ../../build-src/test/src/lcms-tests.el:66

This is happening since quite some time (at least 2018), probably since whe=
n Ubuntu defaulted to O3 for the architecture.

Full log available here:

https://launchpadlibrarian.net/833010987/buildlog_ubuntu-resolute-ppc64el.e=
macs_1%3A30.2+1-2_BUILDING.txt.gz

First failure from Year 2018 is here:
https://launchpadlibrarian.net/405809312/buildlog_ubuntu-disco-ppc64el.emac=
s_1%3A26.1+1-3_BUILDING.txt.gz

Thanks for helping me out

Gianfranco




Acknowledgement sent to Gianfranco Costamagna <locutusofborg@HIDDEN>:
New bug report received and forwarded. Copy sent to bug-gnu-emacs@HIDDEN. Full text available.
Report forwarded to bug-gnu-emacs@HIDDEN:
bug#79955; Package emacs. Full text available.
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